Dear Simon, every second IP-address is unwanted. We restarted eno4: nmcli con down eno4; nmcli con up eno4 and the second address vanishes. Then after a few ours, the second ip address reappears. This is the config-file of eno2: # cat ifcfg-eno2 TYPE=Ethernet PROXY_METHOD=none BROWSER_ONLY=no BOOTPROTO=none DEFROUTE=yes IPV4_FAILURE_FATAL=yes IPV6INIT=no IPV6_AUTOCONF=yes IPV6_DEFROUTE=yes IPV6_FAILURE_FATAL=no IPV6_ADDR_GEN_MODE=stable-privacy NAME=eno2 UUID=cb6fcb54-be52-4ab6-8324-88091a0ea1a0 DEVICE=eno2 ONBOOT=yes IPV6_PRIVACY=no IPADDR=10.10.100.205 PREFIX=24 GATEWAY=10.10.100.254 DNS1=10.10.100.1 DNS2=10.10.100.2 DOMAIN=ourDomain I am not aware of this setting: scope global secondary dynamic So maybe you are able to find it in the nmcli output: # nmcli con edit eno2 ===| nmcli interactive connection editor |=== Editing existing '802-3-ethernet' connection: 'eno2' nmcli> p =============================================================================== Connection profile details (eno2) =============================================================================== connection.id: eno2 connection.uuid: cb6fcb54-be52-4ab6-8324-88091a0ea1a0 connection.stable-id: -- connection.type: 802-3-ethernet connection.interface-name: eno2 connection.autoconnect: yes connection.autoconnect-priority: 0 connection.autoconnect-retries: -1 (default) connection.multi-connect: 0 (default) connection.auth-retries: -1 connection.timestamp: 1600780222 connection.read-only: no connection.permissions: -- connection.zone: -- connection.master: -- connection.slave-type: -- connection.autoconnect-slaves: -1 (default) connection.secondaries: -- connection.gateway-ping-timeout: 0 connection.metered: unknown connection.lldp: default connection.mdns: -1 (default) connection.llmnr: -1 (default) connection.wait-device-timeout: -1 ------------------------------------------------------------------------------- 802-3-ethernet.port: -- 802-3-ethernet.speed: 0 802-3-ethernet.duplex: -- 802-3-ethernet.auto-negotiate: no 802-3-ethernet.mac-address: -- 802-3-ethernet.cloned-mac-address: -- 802-3-ethernet.generate-mac-address-mask:-- 802-3-ethernet.mac-address-blacklist: -- 802-3-ethernet.mtu: auto 802-3-ethernet.s390-subchannels: -- 802-3-ethernet.s390-nettype: -- 802-3-ethernet.s390-options: -- 802-3-ethernet.wake-on-lan: default 802-3-ethernet.wake-on-lan-password: -- ------------------------------------------------------------------------------- ipv4.method: manual ipv4.dns: 10.10.100.1,10.10.100.2 ipv4.dns-search: ourDomain ipv4.dns-options: -- ipv4.dns-priority: 0 ipv4.addresses: 10.10.100.205/24 ipv4.gateway: 10.10.100.254 ipv4.routes: -- ipv4.route-metric: -1 ipv4.route-table: 0 (unspec) ipv4.routing-rules: -- ipv4.ignore-auto-routes: no ipv4.ignore-auto-dns: no ipv4.dhcp-client-id: -- ipv4.dhcp-iaid: -- ipv4.dhcp-timeout: 0 (default) ipv4.dhcp-send-hostname: yes ipv4.dhcp-hostname: -- ipv4.dhcp-fqdn: -- ipv4.dhcp-hostname-flags: 0x0 (none) ipv4.never-default: no ipv4.may-fail: no ipv4.dad-timeout: -1 (default) ------------------------------------------------------------------------------- ipv6.method: ignore ipv6.dns: -- ipv6.dns-search: -- ipv6.dns-options: -- ipv6.dns-priority: 0 ipv6.addresses: -- ipv6.gateway: -- ipv6.routes: -- ipv6.route-metric: -1 ipv6.route-table: 0 (unspec) ipv6.routing-rules: -- ipv6.ignore-auto-routes: no ipv6.ignore-auto-dns: no ipv6.never-default: no ipv6.may-fail: yes ipv6.ip6-privacy: 0 (disabled) ipv6.addr-gen-mode: stable-privacy ipv6.ra-timeout: 0 (default) ipv6.dhcp-duid: -- ipv6.dhcp-iaid: -- ipv6.dhcp-timeout: 0 (default) ipv6.dhcp-send-hostname: yes ipv6.dhcp-hostname: -- ipv6.dhcp-hostname-flags: 0x0 (none) ipv6.token: -- ------------------------------------------------------------------------------- proxy.method: none proxy.browser-only: no proxy.pac-url: -- proxy.pac-script: -- ------------------------------------------------------------------------------- nmcli> Felix On 22/09/2020 14:35, Simon Matter wrote: >> Dear Simon, >> >> >>> And can you diff the config of eno1 and eno4. >> # pwd >> /etc/sysconfig/network-scripts > Okay, nothing to find here. > > What about eno2, you also have two IP addresses there and even in the same > subnet, is this wanted or not? Can the second address of eno2 be found in > the ifcfg file? > > Both eno2 and eno4 have "scope global secondary dynamic" with the second > address and it doesn't seem to come from the base configuration. > > Simon > >> # diff -u ifcfg-eno1 ifcfg-eno4 >> --- ifcfg-eno1 2020-09-21 17:23:25.576672703 +0200 >> +++ ifcfg-eno4 2020-09-22 07:18:43.160532532 +0200 >> @@ -3,15 +3,20 @@ >> BROWSER_ONLY=no >> BOOTPROTO=none >> DEFROUTE=no >> -IPV4_FAILURE_FATAL=yes >> -IPV6INIT=no >> -IPV6_AUTOCONF=no >> +IPV4_FAILURE_FATAL=no >> +IPV6INIT=yes >> +IPV6_AUTOCONF=yes >> IPV6_DEFROUTE=no >> IPV6_FAILURE_FATAL=no >> IPV6_ADDR_GEN_MODE=stable-privacy >> -NAME=eno1 >> -UUID=1e382037-fec9-493d-a4f2-ace7d73a1e7b >> -DEVICE=eno1 >> +NAME=eno4 >> +UUID=dbd95c24-1ed7-4292-8dba-3934bd1476a0 >> +DEVICE=eno4 >> ONBOOT=yes >> -IPADDR=192.168.1.90 >> +IPADDR=192.168.2.98 >> PREFIX=24 >> +DNS1=10.10.100.1 >> +DNS2=10.10.100.2 >> +#DNS3=8.8.8.8 >> +PEERDNS=no >> +PEERROUTES=no >> >>> Can you show the config of eno4? >> # cat ifcfg-eno4 >> TYPE=Ethernet >> PROXY_METHOD=none >> BROWSER_ONLY=no >> BOOTPROTO=none >> DEFROUTE=no >> IPV4_FAILURE_FATAL=no >> IPV6INIT=yes >> IPV6_AUTOCONF=yes >> IPV6_DEFROUTE=no >> IPV6_FAILURE_FATAL=no >> IPV6_ADDR_GEN_MODE=stable-privacy >> NAME=eno4 >> UUID=dbd95c24-1ed7-4292-8dba-3934bd1476a0 >> DEVICE=eno4 >> ONBOOT=yes >> IPADDR=192.168.2.98 >> PREFIX=24 >> DNS1=10.10.100.1 >> DNS2=10.10.100.2 >> #DNS3=8.8.8.8 >> PEERDNS=no >> PEERROUTES=no >> >> Regards, >> >> Felix >> >> _______________________________________________ >> CentOS mailing list >> CentOS at centos.org >> https://lists.centos.org/mailman/listinfo/centos >> > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > https://lists.centos.org/mailman/listinfo/centos